Spring toggle table adjustment for wire stitching machines



Sept 20, 1932.

T. A.' GIBSON 1,878,274

SPRING TOGGLE TABLE ADJUSTMENT FOR WIRE STITCHING MACHINES Filed Dec. 27. 1930 INVENTOR I /ZIZORNEY Patented SeptQZO,

fTh is inventionfrelates to thfioxfksflpptgrt} ing members of machins suchlas Wifestjth ing an'd'the like machines, and'qontmp'laits,

7 among other things, thje'provisionfof a-yyield .b" able r Work support so "designed 1 to danger of damage'to th' machine When'work,

machin is adjuste dii s giper'gi ted upqtll' Tn W r h ng mmh n si h tofj 10 general use, and to high-qiay invent particula l ly applicable; thewoflg 's'tl ppo rt -i hg tablg Or :ipmi's uhyieldable and-frigid thg q h a apa f. fidjflstmnt L e PIQP i eig t to receive and supp drt an atticle wgrk, '7 as a i stack Ofsheets pf I cgrtam V thicknesses;

Within the limits o'f'jthe 'maqhi H the ioperato r,"'thtgr-efol ey "atte lngipt to Stitch h a st c P PQr r heikemf gre t:

erithickne ss than-that to-which the machine' zha ee h j l t ys ii dam e req ft-* 1y occurs; q Furthermore; 111' sllichfnmghlnes,

" the operator inadvertentlyfattnijti tq titch :astack-"0f sheets if greater thiqltgisjs the} adjustment o'fithe fork ;supp'0ift war 0 rants, [01 ofigreatei" "than the? maxifiuim I thickness Whichthe. machinef wi'll p jdprlj take, the machine willbome damaged." or

cannott' bi p p y "st t 'hd of ubstantially double .tlifthiclgigjl t0 which thdnid hiflehfiSb nfidjt .s' k e terimi .i e xat it h d by driving the st-aple's 'ilito the" stagk g s fa as heyf i l gQQfrB o 'f j fg he 45 stack,- without clir iching' thenyandthen-turn; ;ing' the} stack lover Sand driving the staples through fror nthe 7 other face of thg stack; 1' f By the usebfmy invention; the. ilisel tion "of stacks 0f greater thickriesis than that te jwhich the ihiaghine haJs -beenadjusted, cztn- .v t t. "I b i md i tbod,"lioweviw My invention eliminates these c l i lt ws and makes it possible to 'qp mte up 911 a sta ck if h p' Th ariou b j tsi 'f'i iy inYe b Cl ar m the. desis 'ipt qn W 1 n f thfid wing; i 1 whi h f djtistir 'g' .laili m ap lied. iti ma h ne, th u h l t'witll h t odhai; itfne'ed not-t 216965 Ii Y Q mlte m ch z h frf fli blofcls us ial y ?pr v de'd 'w i s cr n9; Qhii es Qarri sffi thisliadabli s ap I p' z tftg' all? Well krigbwn l n the art,

mag-

, t t that" 2 6. the tpa slltl @191 .lfimy. 9 ubs itut dyan fi m'fixfiend fl fiOmT h mi i-1,1 frame 17 a ma ne twh hislkngwm L an g gse', th w rkfisuppdrting emblem is preferably mounted 'forflvrticzvlmavefilent relativelytltb the beatinglS, being-"fimyidfl ing 18, when said bearing and the gage carrier are moved relatively.

The gage 21 is further suitably graduated as by the markings 22, to measure or indicate the distance between the upper surface of the gage carrier and the under surface 24 of v the bearing 18., The gage therefore serves to the ,usual type indicate the adjustment necessary to cause the machine to draw the proper length of wire to form a staple of the proper size. The

clincher box 26 is secured to the shaft 19 and moves therewith and with the carrier 20, when the pressure on the work support exceeds the normal amount necessary to drive a staple into and through a stack, to the thickness of which the machine'hasbeen adjusted. This happens when the stack isof greater than the predetermined thickness to which the machine has been adjusted. The staple clinch ing mechanism in the climbing box 26 is of and need not be shown or described.

- The distance between the top of the work.

table 14,'and the lower end of the staple guide slide 11, when the slide is in its lowermost position, (on the stack), is normally the same as the, distancebetween the surfaces 24 and 25, said distance being determined by the reading on-thegage21 v In order to' adjust said distance to the thicknesspofthe stack to be operated: upon, a fourarmv toggle adjustment is provided. Said toggle is preferably interposed betweenithe bearing 18 and the gage carrier 20.

The upper toggle members or arms 27 and 28 are hinged together and pivoted tothe bearing 18 in the usual manner, as .by means of the pivot bolt 29, while the lower toggle members or arms 30 and 31 are pivoted to the toggle' block 32. The lower surface 33 of the block 32 normally rests upon and engages the upper surface of the lug 34 extending from the gage carrier20, but is not otherwise connected thereto, so that the lug may move downward- 1y independently of the movement, if any, ofjthe block.

shown in Figs. 1 and 2, the spring-carrying pin 35 extends from the block 32, and serves to maintain the compression spring38 in place. Said springiis interposed. between V the adjusting nut.36 and the under surface of the lug 34. Threads are provided at the lowerend of the pin35, engaging thecorresponding threads on the adjusting nut for the purpose of adjusting the spring pressure. A suitable'washer as 39 may be inserted, if'desired, between either end of the spring and the member orpart against which it presses. It will be seen that byturning the nut 36 along the member 32, in either direction, adjustment of the pressure upon the spring 38 maybe obtained to increase or decreasethe force exerted by the spring and consequently,

to increase: or decrease the resistance of the:

Work support to movementunder the presof the spring 38.

sure exerted on the support during the staple driving operation.

For adjusting the effective distance between the upper and lower ends of the toggle connection, and thereby adjustingthe distance between the surfaces 24 and 25, the lower ends of theupper toggle arms 27 and theupper ends of the lower arms 30 are hinged together by means of the pin 46.

Similarly, the toggle members 28 and 31 are creasing the height of the table 14. When.

the endsofthe toggle are drawn together,the block 32 tends to rise up off the lug 34, but

the spring 38 fpressesthem together, and

thereby normally maintains the work support in proper adjusted position.

v Inthe'normal operation of the machine, it is intended that the operator use astack of sheets, the thickness of which is substantial- ,ly thatof the distance between the surfaces 24 and 25indicated on the gage 21. Should'it beidesired, however, to stitch a stack of greater thickness, or should such a stack be inadvertently inserted into the machine, no damage can result. Theldriver 12, in driving the staple into such a stack, may safely complete itsfull normal stroke. Should the stack be of such greater thickness, the finalpart of the stroke of the driver, instead of jamming the parts or damaging the machine, will exert its pressure upon the table 14 andtherethrough on the shaft.l9 and the gage carrier '20. The undue force thus exerted, results in downward movement of the shaft'19 and the'parts carried thereby against'the action It will be understood that by regulating the force exerted by the spring, the point at which-downward movement of the work support begins, can be accurately determined. The table 14 therefore yields downwardly under theexcessive force due to excess thickness of the work, orto failure to adjust the work support to such thickness. The spring 38 returns the parts to their normal positions on the release of the pressure as when the driver 12 moves upwardly on its return stroke.

It will-be seen thatduring normal adjustment of the table 14 by meansofthe adjusting l screw 48 as when thetable height is decreased, the springs 38 further serves'tomaintain the lug34 in contact with the lower surface 33 of the toggle block 32. f

In that form of my invention illustrated in Q specific embodimentsof my invention, I d'o ,v-not wish-to be understoodf asl limiting my-. 7 self thereto, but intend to claim'my inven- Fig. 3,;an extension 5t) projecting irom" the downward pressure of the spring 138. Said main fr'ameal'f off-the machine receivesthe extension is suitably vapertured" as at ';51 to spring, and with the upstanding pin. 55 arranged inside of the spring and maintaining it in position. Atits lower end,,as; 56,the nut 52 is threaded into the threaded aperture- 51 of the eXtension5O. Theupper end ofthe' spring 38Vmay, if desired,{be;inserted into a} 'suitable-reces'sfin. thelower surface either carrier 20.] On downwardmovement of the shaft-19 underle'xcessi pressure of the driver 12; as in the cases previously describedpthe spring'38 returns thefparts to their normal; positions, as has been previously descr1be d.

resulting downward movement'iof the car? rier 20 compresses .thelspring 38fjand takes upY-the excess portion- 'offthe strokefl The Itwill be seen that I haveprovideda simple and efficient yieldable and v adjustable work support for machines ofthe character- L described that by meansot my .inventi0n,the dangers inherent in rigidsupports are elim j "ma ted, that stacks of much greater 'thick-; 'ness than the maximum possible adjustment of the machine may be operated upon therein that such stacks may 'bestitohed byr driving staples througheach of thefaces of the stack without clinching; andfthat I have provided: :an effective mechanism designed to avoid the dangers inherent in rigid [work supports'and.

to meet the severe requirementsof practical 5 pended claims.

9 depending vertically from the support, a frame provided with a bearing sleeve for'the" passage of said shaft,'-1an enlarged member secured to thefshaft below said bearing,a stop 7 use.

While I have shownanddescribed tion as broadly as may be permittedby the 7 state of the prior art andthe termsof thelap- I claim:

'sl1eets,1neans for staplingsaid sheets, a shaft above and in the path ofthefenlarged'mem-- I ber, means supported by the frame. and con-,

necting the stop-tothe frame ioradjusting the height of saidstop and thereby fideterg-j, mining theuppermo'st positionof said table, e and a compression spring "arrangedrbelow adapted to be compressed on the downward movement of the table, the shaft and the memand in the ,path of said enlarged member and ber as a unit.

2. In a wire :machine, a work; 4' support adapted to support a; pile of paper sheets,;lneanstor stapling saidsheet sa'avframe I carrying said support, a stopadjustably' SE1 cured to.:thevframe,meansincludinga threaded member for adjusting theeiiective height ofxsaid stop relativelyto the frame, a mem heron. ,theshaftbelow; said stop, a spring #5 I 'mountedqindependently "of the adjusting a means foradj usting the force exerted by the spring; 5

1 3. Ina w] v porting member, stapling means, a gage adapted to. indicate the height of themember-,zrneans ,for adjusting the effective height of said imember to supportanaar'ticle of pre- -dete'rminedthickness, and: a' compression spring mounted independently of the adjustling means normally maintaining ythe member 1 in; its} adjusted position-Band ,1yieldable with said member i on I the operation by the machine upon an article off-greater"thickness. 4, In amach'ineof the jcharacterdescribed, aiframe, an uprightbearingv on the frame,

:sha'tt" slidable inithe bearing, a work-sup porting tableatitheupperxend' fthe shaft,

re stitchingvma'chine, a'work sup I a gage-carrier at the lowerlendiofthefshaft, i

an. adjustable toggle 1 connection pivoted to the'bearingrand-abuttmgloosely against the gagev carrier, and a compression spring actj} ingpn-Vthe gage carrier tonng -it upwardly against thetoggleysa'id'spring yielding. and 7 10 v i the tablashaftand carrier, moving downwardly independently of: the; toggle=on-the 'exertionof excessive stress-bysthe machine on e-v 1' x 1 '5." I almachineof the characterdescribed, r agwork [support slidablein the frame, an I ad= justable togglejsecured to-the frameat one .end andJloosely-engaging the; support-at 'its other end, and 'aisprlngo urging the support port, S;

into engagement withthelast-mentionedend v ofthe toggle'whereby movement of said .end 7 e j j .of thetoggle adjusts theposition of the sup-j 1. Ina wire stitching machine, a'work support adapted to support a pile of paper GLIYieIdablemeans for theheight of a work supportincluding a toggle fixed at one end and havingits other; end adjustable, and a, spring 'urging-the support into engages ment with, said: othere'nd of 'thet'oggle;

r7;Inamachineofthe-character described,

aworksupporha togglehaving one end fixed and havingr-ethe other end ;mov able, an, adj-ustingscrew for theitoggleto move themov-e 7 jable ,1end," an extension on {the support, and

yiel'dable' means forurging'the extensioninto engagementiwith' the =imovable 'endjof the e teggl a I 8;;,In'amachineotthe charzuzterdescribed, work support, meanslincl uding' a toggle V fixed: at-one ;end,;a nd movableat its other end" for? adjusting; the height foffl the, support, -an d f a'spring fixed eatj'one end, andhavingfitsother adjusted position.

end engaging the support and movable thermeans for adjusting'the effective height of the supporting means to receive an article of predetermined thickness for operation upon the article including a toggle, and yieldable meansindependent of the toggle for. maintaining the supporting means in adjusted position, and yielding with said supporting means when an article of greater thickness is placed on the supporting means, and operated upon by the machine.

10. In a machine of the character described, a work support, a toggle engaging said support for adjusting the effective height of said support, and yieldablemeans for normally maintaining the support in its adjusted position. r 1 '11. In a machine of the character described, a frame, a work support slidable in the frame, a toggle fixed'at one end to the frame and engaging the support at its other end, said toggle being adapted to adjust the 1 5. In amachine of the character descr1bed,a frame, an upright bearing on the frame, a shaft'slidable in the bearing, a work support removably secured to the upper end 0f the shaft, a-toggle. engaging member at the lower end of-theshaft, a four-arm toggle having itstwo upper armshinged together and pivoted to the bearing, and having its two lower arms pivoted together and removably engaging the toggle engaging member, threaded means for pivoting the respective lower ends of the upper arms to the upper ends of the lower arms, an adjusting screw passing through said threaded means for varying the distance between the upper and lower ends of the toggle, an upright pin depending from the lower end of the toggle, an ad usting nut on said pin, and a compression springinterposed between the nut and the toggle engaging member. i

THOMAS A. GIBSON.

efiective height of the support and a spring interposed between the support and the. framefor normally maintainingthe support in its 12. In a machine of the character de-- scribed, a frame, a work support slidable in the frame, a toggle fixed at one end to the frame and engaging the support at its other end, a spring interposed between the support and the frame and means for adjusting the force exerted by the spring.

13. In a machine of the character described, a frame, a bearing on the frame, a shaft slidable in the bearing, a work support at the upper end of the shaft, a spring engage ing member at the lower end of the shaft,a toggle connection interposed between the bearing and the spring engaging member, a spring interposed between the frame and said member, and means for adjusting the force exerted by the spring.

14. In a machine of the character described, a frame, an upright bearing on the frame, a shaft slidable in the bearing, a work support removably secured to the upper end of the shaft, aspring engaging member at the lower end of the shaft, a four-arm toggle having its two upper arms hinged'together and'pivoted to'the bearing, and having its two lower arms pivoted together and removably engaging the spring engaging member, threaded means for V j pivoting the respective lower ends of the upper arms to the upper ends of the lower arms, an adjusting screw passing through said threaded means for varying the distance between the upper and lower ends of the toggle, an extension on said frame, a spring interposed between said extension and the spring engaging member, and means foradjusting 4 the force exerted by said spring. 

